Providing evidence to improve practice

Individual study: Effect of marking eggs to make them unappealing to egg collectors on the nesting success of peregrine falcons Falco peregrinus and wedge-tailed eagles Aquila audax in the Flinders Ranges, South Australia

Published source details

Olsen J., Billett T. & Olsen P. (1982) A method for reducing illegal removal of eggs from raptor nests. Emu, 82


This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.

Mark eggs to reduce their appeal to egg collectors Bird Conservation

A small before-and-after study in the Flinders Ranges, South Australia (Olsen et al. 1982), found that twice as many young fledged from five peregrine falcon Falco peregrinus nests (12 young fledged from 16 eggs) and one wedge-tailed eagle Aquila audax nest (one chick from two eggs) in 1980, when eggs were marked with a single line drawn in black, waterproof ink, as in 1979, when no eggs were marked (6/15 and 0/2 fledged respectively).